Concrete Technology MCQs with answers Page - 47

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Q. For the improvement of workability of concrete, the shape of aggregate recommended is ?

  • (A) irregular
  • (B) angular
  • (C) round
  • (D) flaky

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Q. The standard sand now used in India is obtained from ?

  • (A) Ennore (Chennai)
  • (B) Mumbai
  • (C) Orissa
  • (D) Jaipur

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Q. For reinforced concrete, the aggregate used is ?

  • (A) sand
  • (B) gravel
  • (C) crushed rock
  • (D) all of these

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Q. A moist aggregate is one ?

  • (A) whose all the pores are filled with water and also having its surface wet
  • (B) whose all the pores are filled with water but having its surface dry
  • (C) which do not contain any moisture either in the pores or on the surface
  • (D) which may contain some moisture in the pores but having dry surface

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Q. The value of fineness modulus for fine sand may range between ?

  • (A) 1.1 to 1.3
  • (B) 1.3 to 1.6
  • (C) 1.6 to 2.2
  • (D) 2.2 to 2.6

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Q. Water cement ratio may be defined as the ratio of ?

  • (A) mass of water to that of cement in a concrete mix
  • (B) weight of water to that of cement in a concrete mix
  • (C) volume of water to that of concrete in a concrete mix
  • (D) weight of water to that of concrete in a concrete mix

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Q. Hydration of cement is due to the chemical action of water with ?

  • (A) dicalcium silicate
  • (B) tricalcium silicate
  • (C) tricalcium aluminate
  • (D) all of these

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Q. Proper curing of cement concrete, is good for its ?

  • (A) volume stability
  • (B) strength
  • (C) wear resistance
  • (D) all of these

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Q. When vibrators are used for compaction, the consistency of concrete depends upon the ?

  • (A) type of mix
  • (B) placing conditions
  • (C) efficiency of vibrator
  • (D) all of these

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Q. The process of consolidating concrete mix after placing it in position is termed as ?

  • (A) curing
  • (B) wetting
  • (C) compaction
  • (D) none of these

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